EP 1956245 A3 20140730 - Screw pump rotor and method of reducing slip flow
Title (en)
Screw pump rotor and method of reducing slip flow
Title (de)
Schraubenpumpenrotor und Verfahren zur Schlupfreduzierung
Title (fr)
Rotor de pompe à vis et procédé de réduction d'écoulement glissant
Publication
Application
Priority
US 67314807 A 20070209
Abstract (en)
[origin: EP1956245A2] A pump rotor for a screw pump includes a shaft (42), a first set of threads (44) disposed on a portion of an outer surface of the shaft, at least one thread of the first set of threads including a groove (48) disposed on an end portion thereof, and a ring seal (60) disposed on the groove (48) such that the ring seal is configured to protrude outwardly from the groove and to rest against an inner surface (49) of a liner (51) of the screw pump, and the groove (48) is sized so as to allow the ring seal (60) to move radially with respect to the plurality of threads (44) as the rotor is deflected.
IPC 8 full level
F04C 27/00 (2006.01); F04C 18/16 (2006.01)
CPC (source: EP KR US)
F04C 18/16 (2013.01 - KR); F04C 27/00 (2013.01 - KR); F04C 27/001 (2013.01 - EP US); F04C 29/00 (2013.01 - KR); F04C 18/16 (2013.01 - EP US); F04C 2210/24 (2013.01 - EP US)
Citation (search report)
- [XI] GB 342791 A 19310212 - FREDERICK CHARLES GREENFIELD
- [X] US 3282495 A 19661101 - WALLS JOSEPH D
- [X] US 5533887 A 19960709 - MARUYAMA TERUO [JP], et al
- [A] WO 2005047705 A1 20050526 - BOC GROUP PLC [GB], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
EP 1956245 A2 20080813; EP 1956245 A3 20140730; CA 2619195 A1 20080809; CA 2619195 C 20150811; CN 101240795 A 20080813; CN 101240795 B 20130821; JP 2008196487 A 20080828; JP 5469308 B2 20140416; KR 101420439 B1 20140716; KR 20080074745 A 20080813; RU 2008104910 A 20090820; RU 2461736 C2 20120920; US 2008193309 A1 20080814; US 2011123378 A1 20110526; US 8597007 B2 20131203
DOCDB simple family (application)
EP 08101357 A 20080207; CA 2619195 A 20080131; CN 200810005481 A 20080205; JP 2008023421 A 20080204; KR 20080010532 A 20080201; RU 2008104910 A 20080208; US 201113021106 A 20110204; US 67314807 A 20070209